The x::w::input_field_config's
      alignment and
      direction
      work just like
      x::w::label_config's.
      An additional directional_format setting is an
      x::w::bidi_format
      value that
      governs the default representation of Unicode text.
    
x::w::bidi_format::none (default)Represent the Unicode text without any isolation and embedding markers.
x::w::bidi_format::embeddedAlways include isolation and embedding markers in the Unicode text.
x::w::bidi_format::automaticInclude isolation and embedding markers in the Unicode text when it is heuristically determined they're needed.
      The x::w::bidi_format setting covers:
    
	  The text returned by get() or
	  get_unicode() by default.
	
	  A search input field's
	  search_string
	  uses the standard format, ignoring this setting.